EP 0150590 B1 19890308 - ELECTROSTATIC ISOLATION APPARATUS
Title (en)
ELECTROSTATIC ISOLATION APPARATUS
Publication
Application
Priority
US 57427784 A 19840126
Abstract (en)
[origin: US4629119A] An isolator for electrically isolating an electrostatically charged, electrically conductive coating material supply line from a grounded source of conductive coating material while continuously transferring coating material from the source to the supply line. The isolator includes a receptacle for a charged coating material reservoir and an insulative housing surrounding the charged coating material receptacle. The coating material in the receptacle is fed through an outlet to the supply line for an electrostatic coating device, which is electrostatically charged. Due to the conductive nature of the coating material, the electrostatic potential at the coating device is coupled through the coating material, and the reservoir of coating material in the receptacle is likewise electrostatically charged. The coating material from the grounded coating material source is coupled to a grounded nozzle assembly in a housing which is positioned above the charged coating material receptacle. The grounded coating material nozzle assembly includes a nozzle in a bottom portion thereof, and the coating material in the grounded nozzle assembly is mechanically vibrated to produce a pulsed jet droplet flow of electrostatic coating material from the nozzle into the charged coating material receptacle. A grounded metallic shield is mounted in the housing between the two coating material receptacles to substantially electrically shield the grounded nozzle assembly from electrical potentials below the shield, including the electrical potential of the charged coating material reservoir. The shield is apertured to permit the passage of the pulsed jet droplet flow of coating material.
IPC 1-7
IPC 8 full level
CPC (source: EP US)
B05B 5/1616 (2013.01 - EP US); B05B 5/165 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0150590 A1 19850807; EP 0150590 B1 19890308; CA 1230737 A 19871229; DE 3476972 D1 19890413; JP H0691975 B2 19941116; JP S60175565 A 19850909; US 4629119 A 19861216
DOCDB simple family (application)
EP 84308486 A 19841206; CA 468609 A 19841126; DE 3476972 T 19841206; JP 1181285 A 19850126; US 57427784 A 19840126